CURRENT BAND CONDX = Solar-terrestrial indices for 17 October follow. Solar flux 70 and estimated planetary A-index 6. The estimated planetary K-index at 0900 UTC on 18 October was 1. No space weather storms were observed for the past 24 hours. No space weather storms are predicted for the next 24 hours.

ALERT CONDITION: WHISKY ( WHITE )

Wednesday, October 18, 2017 - 12:21 GMT - UPDATE # 25

OPERATIONAL FORECAST. - GEOMAGNETIC FIELD. The geomagnetic field is expected to be at quiet to unsettled levels on days one and two (18-19 Oct) as CH HSS effects continue to wane. Quiet conditions are likely to return on day three (20 Oct). .- SOLAR ACTIVITY. Solar activity is expected to continue at very low levels the next three days (18-20 Oct).

G/S/R SCALES USED     DEF'S USED     LIGHTNING - (QRN)


HF OPERATIONAL BRIEFING - CURRENT CONDITIONS IN DETAIL

CURRENT SOLAR CONDITIONS


VISIBLE DISK

 


SOLAR MAGNETOGRAM

 


NEAR INFRARED

 


SUNSPOT TRACKING

 

Solar activity remained very low. No Earth-directed CMEs were observed in available coronagraph imagery.


RADIO BLACKOUTS - SOLAR STORMS - GEOMAGNETIC STORMS

The geomagnetic field was quiet, despite waning CH HSS conditions.


"D" LAYER - HF ATTENUATION LEVELS


AURORA  -   NORTH POLE  - SHORT PATH